Grinder



may w 1924s. A mams@ D. A. HARNER ET AL GRINDER Filed Sab, 19.. 1923 2232 20 mulnmlmi 24 ullllllllllm 4 I J. JY Ostergardfy atto: nu

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Patented May 13, 1924,

UNITED f STATES PATENT oFFicE.

DAVID A. HARNER AN'IDJU'LIUS N. OSTERGARD, OF CEDAR FALLS, IOWA.

GRINDER.

Application led February 19, 1923. Serial No. 619,956.

To u- 2li/10m if may con-cern.:

Be it known that we, DAvin A. HARNER and JULIUs Omnitel-um, citizens ofthe United States of America, and residents of Cedar Falls, BlackhawkCounty, Iowa, have invented certain new and useful Improvements inGrinders, of which the following is a specification. 1

Our invention relates to improvements in grinders, and the object of ourimprovements is to provide a simple, inexpensive and easily operatedrotary grinder, having several adjustments between its relativelymovable parts.

This object we have accomplished by the means which are hereinafterdescribed and claimed, and which are illustrated in the accompanyingdrawings, in which Fig. 1 is a side elevation of our grinder, with partsbroken away or shown in longitudinal section. Fi 2 is a front elevation,and Fig. 3 a top p an thereof.

The device shown is of a small, simple and light type, suitable for useby barbers and others in sharpening shears and scissors or other smallarticles, or in grinding same,` and minor variations in its parts arecovered by the invention.

The numeral 1 denotes a discoidal grinder made of any suitable abrasivematerial, and preferably having its forward angle removed frustally at2. This disk 1 is xedly mounted coaxially upon a rotatable shaft 3 whichis rotatably mounted in the cylindrical bore 8 of a horizontallyelongated bearing-body 5. This body 5 has a rigid depending stem 19,short and cylindrical, and which 1s mounted to rock horizontally in asocket 20 in the upper part of a clampingbody 23. In order to adjustablysecure said stem in said socket, a set-screw 22 moves in a threaded hole21 in said clamping-body to terminally engage the stem. The clampingbody23 has parallel projecting members provided with facing disks or tubularparts 24 and 25. The lower part 25 is centrally orificed and threaded toreceive an adjusting screw 26 which has a pivoted head 27, so that asupporting body 28 may be clamped between the parts 24 and 27.

The rear part ofthe shaft 3 within the bore 8 is provided with aV-shaped annular groove 6 to receive the lower wedge-shaped end of a in18 seated in a vertical hole in said bearing-body 5 to project upwardlya short distance therefrom. This projecting extremity has a diminishedtip 17 which is passed through a hole in the free end of a late-spring16. The spring is positioned along a flattened portion of the bearingbody and has its other end secured to the bearingbody by means of ascrew 15, and the free end of the spring bears downwardly under adesired amount of tension against the annular shoulder below the tip 17on the pin 18, whereby the pin serves as a/stop to prevent longitudinaldisplacements of said shaft, but the contact being loose does not bindthe shaft.

Immediately to the rear of the groove 6 the shaft end is diminished indiameter and provided with a longitudinal slot 10 opening to the rear toreceive and be engaged by a projection 9 on a diminished end 11 of acylindrical head 12 on a flexible power shaft 13, the latter adapted tobe driven by any suitable motor not shown. A screw 14 is mounted in athreaded hole in the rear end of said bearing-body and may be moveddownwardly enough to pass behind the Vshoulder of the enlargedshaft-head 12 to keep the latter in engagement with the other shaft 3. A

The numeral 29 denotes a fiat split-ring mounted to be clam ed forrocking adjustment upon a diminis ed part of the forward end of thebearing-body 5, said ring having at its split outwardly directed ends 42provided with alined holes, the lowermost threaded to take the screw 41,so that when the screw is loosened the position of the ring may bechanged by rocking it upon its support to vary the angular positionofthe arm 30 which projects from the ring about oppositely to said parts42.

Another arm 33, of curved shape, has its disked end 31 secured to theend of the arm 30 by means of a screw 32, whereby when the screw isloosened the arm 33 may be adjustably swung to a desired adjustedposition, the screw being tightened to hold the arm rigid. The outer endof the arm 33 is flattened at 34 and has a longitudinal slot 35.

A supporting element or block 37 has a longitudinall slot 38 and may bepositioned upon the arm part 34to have parts of the slots 35 and 38alined to permit a screw-bolt 36 being passed therethrough and securedwith the block 37 in an adjusted position by means of a wing-nut 39. Theupper end of the block 37 is bent over angularly at 40 to provide atubular support upon which to restan article, such as shears to beoperated upon by the grinding disk 1. It will be seen that the grindingmay be effected with great facility, because of the several adjustmentserlnitted in the parts of the device, Wheregy the bearing-body may as awhole be rocked horizontally at 19, and secured, and the tubular part 40positioned at any desired angle relative t the disk 1 or at differentdistances therefrom, because of the adjustable ring-clamp 29, and theadjustable jointed members 83-34 and 37. The bevel edges of shearmembers may be ground to desired angles of inclinations as required fordiffering uses in cutting various materials. The part 40 allows such anarticle to be supported slidingly thereupon or be presented to the disk1 at changed directions.

The shaft 3 may be coupled releasably to the flexible shaft of a motor,such as those often found in barber or other shops or places, by theengaging-means shown.

Having described our invention, What we claim as new, and desire tosecure by Letters Patent, is:

1. A grinding device, comprising a bearing-body, a shaft mountedrotatably in said bearing-body, having an abrading head secured on oneend and having an annular groove therearound Within the bearing body,said bearing-body being apertured and a pin slidably mounted in theaperture to extend into said annular groove, resilient means bearingupon the outerend of said pin adj ustably, and a Work-holder bracketedadjustably upon said bearing-body.

2. A Grinding device, comprising a clamplng-devlce, a bearing-bodyrockingly mounted thereon, means for securing the bearingbody to theclamping-device in a desired position of relative adjustment, a shaftrotatably mounted in said bearing-body and having an abrading head onone end, a jointed work-holder bracketed adjustably 'upon saidbearing-body, means for holding the Work-holder in an adjusted positionupon the bearing-body, elementsv of the jointed Work-holder beingslidably connected, and securing-means for holding saidslidably-connected elements in adjustment relative to the abrading head.

Signed at 'Waterloo, Iowa, this 17th day of J an., 1923.

DAVID A. HARNER. JULUS N. OSTERGARD.

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